Sliding door lock



Patented Aug. 26, 1941 SLIDING DOOR LOCK Hancil Cordrey and Walter J.Duvall, Chula Vista, Calif., assignors to Peabody-Acker, Inc., Los

Angeles, Calif.

v Application March 19, 1940, Serial No. 324,782

(Cl. 'l0-,447)

7 Claims.

'I'his invention relates to a sliding door lock construction and morespecically to a faceplate pull having a way through or across it, incombination with a catch which is stationed on the door frame adjacentto the door opening and which projects at times through said way oropening of the face plate into an operative relation with a keycontrolled locking mechanism.

Among the objects of this invention are, to provide an improved slidingVdoor lock including a pull element which may be conveniently anddependably used to open a sliding door, and which will not add to thenumber of parts used to lock and operate the door; to provide improvedmeans to manually start closing the door; to provide a door locking anda door operating means wherein, when the locking elements are not intheir operative position, the operation of the door will not cause anywear upon said locking elements; to provide a locking mechanism aportion of which will serve to guide and center the door acn curately inits closing movement thereby preventing wear occurring between the edgesof the advancing door and its casing; and to otherwise improve andsimplify door operating and locking means of the kind to which theinvention pertains.

With the foregoing and other objects in view, the invention resides inthe novel arrangement and combination of parts and in the details ofconstruction hereinafter described and claimed, it being understood thatchanges in the precise embodiment of the invention herein disclosed maybe made within the scope of what is claimed without departing from the`spirit of the invention.

Referring to the accompanying drawing, which illustrates what is atpresent deemed to be a preferred embodiment of the invention- Fig. 1 isa perspective view of a partly open door showing the same equipped withourinvention.

Fig. 2 is a vertical mid-section of a fragment of the front edge portionof a sliding door showing our lock mounted therein. In this view theescutcheon casing is shown in elevation as to its ange and the remainderthereof in vertical'midsection. The swingable face plate is shown infull lines in its retracted position and in dotted lines in its outswungposition.

Fig. 3 is a View similar to Fig. 2 except that a fragment of the doorjamb is shown carrying the stationary catch, and the paired locking dogsare shown in their inoperative position in full lines, and in theiroperative position in dotted lines.

Fig. 4 is a section taken on line 4-4 ofFig. 3.

Fig. 5 is a faceview of the front end of the `lock casing, the shank ofthe stationary catch kbeing shown in section.

Referring in detail tothe drawing, the lock casing shown has an innerportion II which is expanded above and below in an arcuate manner and isalso of a greater width than the inner portion I0. Each side of theexpanded casing portion I I has an internal, plate-like boss or rise I2,said parts I2 being positioned to guide the movements of a pair ofvertically swingable dogs I3 when the two-part casing shown is in itsassembled condition. Said dogs are furnished at their inner ends withpivot pins I3a, which may also assist in holding together the two halvesof the lock casing.

Said dogs I3 are each furnished with a straight .shank portion I4 whichat its inner end is outcurved at I5 away from its fellow, therebyproviding opposed, internal cam Vfaces to cooperate with the wings I6 ofthe key operable barrel I'I.

The above described two locking dog structures are identically shapedexcept that the upper one as shown in Figs. 2 and 3 is actuated when thekey operable barrel acts upon its rearwardly lo; cated cam face I8,whereas the corresponding cam face I9, of the other dog is locatedsomewhat forwardly of said cam face I8, this arrangement being necessaryin order to cause the barrel wings I6 to swing the 'dogsapart from theclosed position shown in Fig. 2 to that shown in the full lines in Fig.3, when the barrel is turned in a clockwise direction. The movement ofone of the wings I6 of the barrel across the cam face I8 is arrested Icya shoulder 20, and the movement of the other wing is arrested'by ashoulder 2 I. Two compression springs 22 vare shown which act upon theouter Sides of the dog vShanks to press them toward each other exceptwhen opposed by the barrel having been turned as aforesaid. Each of saidsprings is shown heldin place by an annular boss 23 which projectsinternally from the rectangular portion of the casing.

The lock is shown provided with a pendant swingable face plate 25, thepivot 26 of which supports said swingable plate in a downwardly spacedrelation to its upper end, said pivot ex tending athwart the frontportion of the two-part casing, and providing an inswingable arm portion25h above it. Said face plate has an elongated opening 25a extendinglengthwise of its lower portion, said opening being suiciently large toserve as a way to admit the -beveled head 21 which is carried by theneck 28 of the catch element 29, the base portion of said catch elementconsisting of a plate which is counter-sunk into and is attached to thejamb SI! by screws 3l.

Said swingable face plate 25 is furnished at its lower end with a hookor arcuate nger 32 which normally occupies the lower part of the spacebetween the lock casing wall portions I la resulting from the arcuateexpansion above and below of the front portion of the 1ock casing. Saidhook is utilizable to apply manual traction to the closed door towithdraw it from the recess it normally occupies in the wall.

Each dog I3 is shown having an outer cam face 35 at the inner end ofwhich the dog has a tooth 36, the dogs being thus shaped to cause themto slide over and then catch behind the upper and lower portions of thecatch head 21 forming the shoulders 21a, when the springs 22 arepermitted to exert unopposed action upon the dog shanks. Each of thelocking dogs is shown provided at the outer end of its shank portionwith an arcuate internal recess 40 thus making room for the screw 4Iwhich forms the main means for securing the two halves of the lockcasing together. Said lock casing is shown furnished with theconventional upper and lower front iianges 42 to receive the screws 43and connected by the lateral or rim anges 44.

Various key means may be used for the purpose of turning the barrel I1.As shown, said barrel has a square passage through it into one endportion of which is ilttable a square key 45 and into the opposite endportion of which key is ttable a key 46 which telescopes into said key45 a considerable distance. The key 46 is assumed to be the outside keyand is of a removable character, being square and furnished along oneside with a groove 41 within'which is a bowed leaf spring 48 that actsfrictionally to removably maintain the key in its inserted positionwithin the other key. Said keys 45 and 4S pass through verticallyelongated escutcheon plates 50, having shoulders I which provideconvenient finger holds for use to complete the opening of the doorafter it has been somewhat withdrawn from the door recess by tractionupon the hooked face plate 25. The key 45 will ordinarily benon-removable and will project from the inner (for example, bathroom)side of the door. Said key 45 is shown furnished with a square shank 45swhich i'lts within the internally square barrel I1. Before putting saidkey 45 into place it is passed through the escutcheon plate 50 which hasthrough it a sufficiently large opening to permit, without frictionalcontact, the free rotation of the square shank of the inserted key. Thewasher 451.0 and securing pin 45:0 are also put in place before theescutcheon plate 50 has been secured to the door by screws 58s orotherwise.

Viewed in plan the base portion of the catch head 21 is as wide as theneck 28 (see Fig. 4), but as seen in vertical section or in sideelevation said head is much wider than said neck, thus providing theaforementioned catch shoulders 21a to be engaged by the teeth 35 of thedogs. The outer part of said head 21 is tapered both as seen in plan andin side elevation, and cooperates with the lock casing and its dogs insuch a manner as to center the slidable door during the final portion ofits closing movement, thereby preventing injurious wear or contact ofthe front edge portion of the door with its casing.

In describing the operation of the device it will be assumed that thesame is installed as a door lock for a bathroom, or other room, withregard to which the removable key 46 (Fig. 4) is on the outer side ofthe door in relation to said room, the permanently inserted key 45 beinginside the room when the door is closed.

Before a person enters the bathroom he will remove the key 46 so that,after he has entered the room, closed the door, 'and locked it by meansof the key 45, there will be no outside means whereby the door may beopened while the bathroom is in use. When the person who is using theroom has entered, he will turn the barrel I1 by means of the key 45,from the position in Fig. 3 in an anti-clockwise direction, therebypermitting the compression springs 22 to swing the dogs I3 toward eachother into a locking relation to the catch head 21.

Preparatory to closing the door the person entering the room will presshis finger against the part 25h of the arm 25 which is above its pivot26, thereby inswinging the contacted part and swinging the hooked lowerportion of said arm outwardly as indicated by dotted lines in Fig, 2,whereupon he will use the linger 32 of said arm as a means for applyingtraction upon the door `to draw it from its recess to a sufficientextent to enable him to use the shouldered portion 5l of the escutcheon5i! to complete the closing movement of the door. Having closed the doorhe will lock it by rotating the barrel I1, by means of the key 45, in ananti-clockwise direction from the position thereof shown in Fig. 3, thuspermitting the springs 22 to contract the toothed portions of the dogsto locking position.

Performing the above recited series of operations in the reverse orderwill enable him to open the door and leave the room, whereupon he willreplace the key 46. While the key 45 is removed an indication will begiven to persons outside of the room that the room is occupied, but whensaid key is in place it will be evident that the room is unoccupied,even if at such time the door is closed. An auxiliary emergency keyproviding access to the room when such room is occupied may be providedin a secretive place close by.

It will be obvious that by providing the way 25a through the swingablepull 25 and disposing the parts in such a manner that the stationarycatch may project through said way when the door is closed, much lessvertical space is required in which to mount said swingable pull thanwould be necessary if all parts of said swingable pull were locatedeither above or below the portion of the locking mechanism with whichsaid stationary catch registers. By using one dog only of the paireddogs shown, space may be still further economized and the rear portionof the lock casing reduced in the manner shown.

What has been referred to as a stationary catch may be carried by thedoor casing or by another sliding door extensible from the opposite sideof the door opening.

We claim:

1. In a door lock, a casing having an Open front end portion furnishedwith a face plate to close such opening, said face plate having throughit an opening to admit a stationary locking element, said face platebeing pivotally supported subjacent its upper end to swing in asubstantially vertical plane and being manually operable for movement toan outswung position by depressing the portion thereof above its pivotwherein its opposite end constitutes a handle means for applyingtraction to a door.

2. In a sliding door lock; the combination of a pivoted face plate pullfurnished with a way, said pull being pivotally supported in the frontend portion of said lock at a point in a down- Wardly spaced relationboth to the upper edge of said lock and the upper end of said pull toswing in a substantially vertical plane and being operable for movementto an outswung position by manually depressing the portion thereof aboveits pivotal support, and a dog pivoted to said lock and having a toothpartially underlying said way engageable with a catch adapted to entersaid Way.

3. A lock casing of a generally flat character having an arcuatelyopening front or outer portion which extends in a vertical directionwhen said casing is in place in a recess in the outer edge portion of asliding door, and a pendant arm pivotally supported in the front portionof said casing at a point in a downwardly spaced relation both to theupper edge of said casing and to the upper end of said arm to close suchopen portion, the lend portion of said arm above its pivot beingmanually accessible for inward swinging in the area dened by saidarcuately expanded portion thereby to cause its lower end portion toswing outwardly for being grasped as a handle means usable to pull thedoor toward its closed position, said arm having through its lowerportion an opening, and locking means within said casing engageable witha stationary locking member positioned to enter said opening as saiddoor approaches its closed position.

4. In a door lock, a casing having a front end portion furnished with aface plate, said face plate being pivotally supported in the front endportion of said casing at a point in a downwardly spaced relation bothto the upper edge of said casing and the upper end of said face plate toswing in a substantially vertical plane and being manually operable formovement to an outswung position by depressing the portion thereof aboveits pivotal support wherein it constitutes a handle means for applyingtraction to a door, said face plate having through it an opening toadmit a stationary locking member positioned to enter said openingduring the closing movement of the door.

5. In a sliding door lock; the combination of a face plate pullfurnished with a way, said face plate being pivotally supported in thefront end portion of said lock at a point in a downwardly spacedrelation both to the upper edge of said lock and the upper end of saidface plate to swing in a substantially vertical plane and being manuallyoperable for movement to an outswung position by depressing the portionthereof above its pivotal support wherein it constitutes a handle meansfor applying traction to the door and a spring-pressed dog pivoted tosaid lock and having a tooth partially underlying said way soconstructed and arranged that it engages an externally mountedstationary locking member positioned to enter said way when the door isslidably advanced to the closed position.

6. A lock casing of a generally flat character having an expanded frontor outer portion which extends in a vertical direction when said casingis in place in a recess in the outer edge portion of a sliding door, anda pendant arm pivotally supported in the front portion oi said casing ata point in a downwardly spaced relation both to the upper edge of saidcasing and to the upper end of said arm, the end portion of said armabove its pivot being manually accessible for inward swinging thereby tocause its lower end portion to swing outwardly for being grasped as ahandle means usable to pull the door toward its closed position, saidarm consisting of a flat metal strip having through its lower portion anopening.

"1. In a lock casing having an open front end portion mounted upon asliding door, a pair of elongated locking dogs extending alongside ofeach other and pivotally mounted in said casing to swing toward and fromeach other, said dogs each having adjacent to one side of said casing alocking tooth which is directed toward that of its fellow, a pendantface plate to close said opening, said face 'plate having through it anopening to admit a station-ary catch mounted upon a part toward and fromwhich said door is slidable to be engaged between the toothed portionsof said dogs when the door is closed, said face plate being pivotallysupported in the front end portions of said casing at a point in adownwardly spaced relation both to the upper edge of said casing and theupper end of said face plate to swing in a substantially vertical planeand being manually operable for movement to an outswung position bydepressing the portion thereof above its pivotal support wherein itconstitutes a handle means for applying traction to said door; springmeans tending to swing said dogs toward each other, and a turnablebarrel mounted in said casing between said dogs, said barrel havingwings engageable with adjacent side portions of said dogs to swing themapart and maintain them separated to a suilicient extent to allow anunobstructed movement of the toothed portions thereof across saidstationary catch.

HANCIL CORDREY. WALTER J. DUVALL.

